code: def bow_tag_tokens(tokens: Sequence[str], bow_tag: str = "<w>"):
      """Applies a beginning of word (BoW) marker to every token in the tokens sequence."""
      return [bow_tag + t for t in tokens]
  
file_path: jiant/jiant/utils/tokenization_utils.py
imports: import re
  from typing import Sequence
label_desc: Use image node_id 1 for calling a global function with example usage: bow_tag_tokens(tokens, bow_tag) and returns: unknown